Liquid Glass to Fix leaking Head Gasket??????

I got into a discussion with a guy about my 94Ford Van being ready for the junk yard because water was leaking into the cyclinders. We went down path of pulling engine to get a peek and maybe fix the problem. He then said that if you are considering replacing the engine then put liquid glass into the cooling system. It will definitely fix the leak.........

I know you guys don't like Mechanic in a bottle but how about this brew

I've not heard of liquid glass for head gasket leaks, but have heard of it for cracked heads. My BIL used it on a diesel utility tractor (35hp) with mixed results, but ultimately he had to replace the head--not inexpensive!!!

This is what the van looks like. The inside up front is almost perfect shape. The back was changed with racks for irrigation truck.

The van was in three pretty good shops before the last one came up with water in cyclinders. They also believe that there is just tooo much rust in the cooling system. Freeze plugs are leaking and maybe more damage due to the rust. The engine would have to be removed to get to all the stuff. I would expect that would end up around 2 3k. A new rebuilt engine would be about in the same range. At this point we replaced it with new chev van and was planning this as back-up and maybe used by new irrigation guy. If this van wasn't so hard to work on we might go for it but.......they are killer to repair.